JP6862690B2 - Flush toilet - Google Patents

Description

The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed by washing water supplied from a washing water source and discharges filth.

Conventionally, as shown in FIGS. 3, 5 and 6 of Patent Document 1, the rim portion is formed so as to stand up substantially in the vertical direction in order to improve the cleanliness felt by the user, and further, the filth of the bowl portion is formed. A headrace (indicated as a shelf in Patent Document 1) is formed between the receiving surface and the rim, and a swirling flow is formed by the washing water discharged from the rim spout onto the headrace to form filth. A flush toilet that cleans the receiving surface is known.

Japanese Unexamined Patent Publication No. 2013-44177

However, in a flush toilet as shown in Patent Document 1, since the headrace in the front part of the bowl portion is arranged at a relatively high position between the waste receiving surface and the rim portion, a male user When a man sits down and urinates, there is a problem that the user's urine climbs up the rim portion from the headrace and flows out or jumps out of the toilet bowl body beyond the rim portion. In particular, in a flush toilet equipped with a rim portion formed so as to stand up almost vertically, there is a problem that the urine of a user sitting on the toilet bowl easily flows out of the toilet bowl body from the headrace beyond the rim portion. Will occur.

On the other hand, by lowering the height position of the headrace in the front part of the bowl part to a lower position, when a male user sits down and urinates, the urine flows out of the toilet bowl body beyond the rim part. It was considered to prevent it.
However, by lowering the headrace at the front of the bowl, a height difference occurs in the headrace, and an ascending flow path that rises from the headrace that will be formed at a lower position at the front of the bowl is required. Therefore, as the water flow of the washing water drops in this ascending flow path, most of the washed water whose water force has dropped flows down to the sewage receiving surface, and the non-cleaning area is created on the sewage receiving surface and the headrace in the bowl portion. The problem of causing it to occur has arisen.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and the cleaning water reaches the upper end of the ascending flow path of the headrace on the sewage receiving surface side inside the bowl portion. It is possible to prevent the water from flowing down too much, and the washing water does not reach the upper end of the ascending flow path, and the flow that flows down from the ascending flow path to the filth receiving surface side is not formed, so that an uncleaned area in the bowl portion is generated. It is an object of the present invention to provide a flush urinal that can effectively suppress such things.

In order to achieve the above-mentioned object, the present invention is a water-washing toilet bowl that is washed with washing water supplied from a washing water source and discharges filth, and has a bowl-shaped filth receiving surface and a vertical wall surface that rises substantially upward. A bowl portion provided with a rim portion, a drain trap conduit connected to the lower portion of the bowl portion to discharge filth, and a rim water discharge portion provided in the rim portion to discharge washing water into the bowl portion. The bowl portion is formed in a circumferential shape between the filth receiving surface and the rim portion, and the washing water discharged from the rim water discharge portion is easily guided in the circumferential direction, so that the bowl portion swirls into the bowl portion. The headrace forms an inclined surface that descends from the inside to the outside of the bowl portion or from the inside to the outside of the bowl portion in at least a part of the ascending flow path that rises from the deep part of the headrace portion. The rim water discharge portion is arranged at one place of the rim portion, and the ascending flow path is the rim water discharge portion on the downstream side from the deep part of the headrace. Since the washing water that rises toward the portion and rises from the deep part of the headrace can easily flow toward the rim spouting portion along the shelf portion, the washing water can easily flow from the rim spouting portion at one place. Even if the ascending flow path is provided so that the discharged wash water rises from the deep part of the headrace, it is characterized in that it forms an orbiting flow around the headrace.
In the present invention configured as described above, when the washing water conducted in the circumferential direction on the headrace goes up the ascending flow path rising from the deep part of the headrace and the water force of the washing water is weakened, the headrace canal. In at least a part of the ascending flow path of the bowl portion, the shelf portion forms an inclined surface descending from the inside to the outside of the bowl portion or a horizontal plane formed horizontally from the inside to the outside of the bowl portion. It is possible to prevent the water from flowing down too much toward the sewage receiving surface inside the bowl portion by the time the water reaches the upper end portion of the ascending flow path. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface before reaching the upper end of the ascending flow path, and the washing water does not reach the upper end of the ascending flow path and is not reached from the ascending flow path. It is possible to effectively suppress the generation of an uncleaned region in the bowl portion due to the fact that the flow flowing down to the waste receiving surface side is not formed.
Further, in the present invention configured as described above, when the washing water conducted in the circumferential direction on the headrace goes up the ascending flow path rising from the deep part of the headrace and the water force of the washing water is weakened. In at least a part of the ascending channel of the headrace, the shelf forms an inclined surface that descends from the inside to the outside of the bowl, so that the washing water reaches the upper end of the ascending channel before the bowl. It is possible to prevent the portion from flowing down too much toward the filth receiving surface side inside the portion. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface before reaching the upper end of the ascending flow path, and the washing water does not reach the upper end of the ascending flow path and is not reached from the ascending flow path. It is possible to more effectively suppress the generation of an uncleaned region in the bowl portion due to the fact that the flow flowing down to the waste receiving surface side is not formed.

In order to achieve the above-mentioned object, the present invention is a water-washing toilet bowl that is washed with washing water supplied from a washing water source and discharges filth, and has a bowl-shaped filth receiving surface and a vertical wall surface that rises substantially upward. A bowl portion provided with a rim portion, a drain trap conduit connected to the lower portion of the bowl portion to discharge filth, and a rim spouting portion provided in the rim portion to discharge wash water into the bowl portion. The bowl portion is formed in a circumferential shape between the filth receiving surface and the rim portion, and the washing water discharged from the rim water discharge portion is easily guided in the circumferential direction, so that the bowl portion swirls into the bowl portion. The headrace forms an inclined surface that descends from the inside to the outside of the bowl portion or from the inside to the outside of the bowl portion in at least a part of the ascending flow path that rises from the deep part of the headrace portion. It is provided with a shelf that forms a horizontal plane formed horizontally toward the bowl, the rim spout is arranged to spout rearward in the front region of the bowl, and the ascending flow path of the headrace is , Form an ascending flow path from the deep part of the front part of the bowl part to the rim water discharge part.
In the present invention configured as described above, when the washing water conducted in the circumferential direction on the headrace goes up the ascending flow path rising from the deep part of the headrace and the water force of the washing water is weakened, the headrace canal. In at least a part of the ascending flow path of the bowl portion, the shelf portion forms an inclined surface descending from the inside to the outside of the bowl portion or a horizontal plane formed horizontally from the inside to the outside of the bowl portion. It is possible to prevent the water from flowing down too much toward the sewage receiving surface inside the bowl portion by the time the water reaches the upper end portion of the ascending flow path. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface before reaching the upper end of the ascending flow path, and the washing water does not reach the upper end of the ascending flow path and is not reached from the ascending flow path. It is possible to effectively suppress the generation of an uncleaned region in the bowl portion due to the fact that the flow flowing down to the waste receiving surface side is not formed.
Further, in the present invention configured as described above, the washing water conducted in the circumferential direction on the headrace goes up the ascending flow path that rises from the deep part of the front part of the bowl part to the rim water discharge part, and the washing water is washed. When the water force is weakened, in at least a part of the ascending flow path of the headrace, the shelf is formed horizontally from the inside to the outside of the inclined surface or the bowl part that descends from the inside to the outside of the bowl part. Since the horizontal surface is formed, it is possible to prevent the washing water from flowing too much toward the sewage receiving surface side inside the bowl portion by the time it reaches the upper end portion of the ascending flow path. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface before reaching the upper end of the ascending flow path, and the washing water does not reach the upper end of the ascending flow path and is not reached from the ascending flow path. It is possible to more effectively suppress the generation of an uncleaned region in the bowl portion due to the fact that the flow flowing down to the waste receiving surface side is not formed.
Further, since the rim spouting portion is arranged so as to discharge water toward the rear in the front side region of the bowl portion, the rim spouting portion is difficult to see and stand out from the user standing on the front side of the bowl portion. Has been done. Therefore, by making the rim water spouting portion inconspicuous, it is possible to prevent the user from worrying about dirt and the like on the rim water spouting portion, and it is possible to easily give the user an aesthetic appearance as the whole bowl portion.

In the present invention, preferably, the shelf portion of the headrace is formed from the central portion to the upper end portion of the ascending flow path.
In the present invention configured in this way, the wash water conducted in the circumferential direction on the headrace rises in the ascending flow path that rises from the deep part of the front part of the bowl part to the rim water discharge part, and the water force of the wash water is increased. When weakened, the water force of the wash water is particularly weakened. From the central part to the upper end of the ascending flow path of the headrace, the shelf part descends from the inside to the outside of the bowl part, or from the inside to the outside of the bowl part. Since the horizontal plane formed horizontally is formed, it is possible to prevent the washing water from flowing too much toward the sewage receiving surface side inside the bowl portion by the time it reaches the upper end portion of the ascending flow path.

In the present invention, preferably, the shelf portion of the headrace has the origin at the intersection of the front-rear direction axis that bisects the bowl opening of the bowl portion to the left and right and the left-right direction axis that bisects the bowl opening to the front and back. Of the left and right regions of the anteroposterior axis with this origin as the center, the region on the downstream side of the swirling flow formed in the bowl with respect to the anteroposterior axis and the central angle from the anteroposterior axis is 20 degrees or more and 60 degrees or less. It is formed in the area of the range of.
In the present invention configured in this way, the washing water conducted in the circumferential direction on the headrace rises up the ascending flow path that rises from the deep part of the front part of the bowl part to the rim water discharge part, and the water force of the washing water is increased. In the region where the central angle from the anteroposterior axis where the washing water is weakened is 20 degrees or more and 60 degrees or less, the shelf portion descends from the inside to the outside of the bowl portion or the above. Since a horizontal plane is formed horizontally from the inside to the outside of the bowl part, the washing water flows too much toward the sewage receiving surface side inside the bowl part by the time it reaches the upper end of the ascending flow path. It is possible to prevent it from being stored.

According to the flush toilet of the present invention, it is possible to prevent the flush water from flowing too much toward the filth receiving surface inside the bowl portion by the time it reaches the upper end of the ascending flow path of the headrace, and the flush water can be prevented. It is possible to effectively suppress the occurrence of an uncleaned region in the bowl portion due to the fact that the flow does not reach the upper end of the ascending flow path and the flow flowing down from the ascending flow path to the filth receiving surface side is not formed.

It is a schematic perspective view which shows the state which the urinal body part of the flush toilet according to one Embodiment of this invention is seen from the oblique rear. FIG. 3 is a schematic plan view of a flush toilet according to an embodiment of the present invention shown in FIG. It is sectional drawing which looked at the central cross section in the left-right direction in the flush toilet according to one Embodiment of this invention from the left side, and shows the state which the toilet lid and the toilet seat were rotated to the lower position. It is sectional drawing along the IV-IV line of FIG. It is sectional drawing along the VV line of FIG. It is sectional drawing along the VI-VI line of FIG. It is sectional drawing along the line VII-VII of FIG.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
First, FIG. 1 is a schematic perspective view showing a state in which the toilet body portion of the flush toilet according to the embodiment of the present invention is viewed from diagonally rearward, and FIG. 2 is a flush toilet according to the embodiment of the present invention shown in FIG. It is a schematic plan view of the toilet bowl, and FIG. 3 is a cross-sectional view of the central cross section of the flush toilet according to the embodiment of the present invention in the left-right direction as viewed from the left side, in which the toilet lid and the toilet seat are rotated to the lower position. Is shown.

As shown in FIGS. 1 to 3, the flush toilet bowl 1 according to the embodiment of the present invention includes a toilet bowl body 2 made of earthenware and a toilet seat 4 rotatably arranged on the upper surface of the toilet bowl body 2. A toilet lid 6 rotatably arranged in the vertical direction so as to cover the toilet seat 4 and a functional unit 8 arranged behind the toilet body 2 are provided.
Further, as shown in FIG. 3, the functional unit 8 is arranged in the upper rear part of the toilet bowl main body 2 and functions as a sanitary cleaning unit for cleaning a local part of the user, and a sanitary cleaning system functional unit 10 and the sanitary cleaning system. It is arranged close to the functional unit 10 and includes a water supply system functional unit 12 involved in the water supply function to the toilet bowl main body 2.

Next, as shown in FIGS. 1 to 3, the toilet bowl main body 2 includes a bowl-shaped filth receiving surface 14 and a rim portion 18 forming a vertical wall surface that rises substantially upward above the filth receiving surface 14. The bowl portion 20 is provided. As shown in FIGS. 4 to 7 described later, the rim portion 18 is formed so that the inner peripheral surface of the rim portion 18 rises substantially in the vertical direction. The rim portion 18 omits a general overhang shape that causes the top of the inner peripheral surface of the rim portion to protrude largely inward, and omits a so-called overhang shape that extends substantially linearly upward. It constitutes a so-called borderless shape.
Further, as shown in FIG. 3, the toilet bowl main body 2 is provided with a drain trap pipeline 22 which is a drainage channel for discharging filth in the bowl portion 20 by connecting an inlet portion 22a below the bowl portion 20. ..

Next, as shown in FIG. 2, the bowl portion 20 is a part of the rim spouting portion inside the rim portion 18 on the right side in the front side region of the bowl portion 20 when viewed from the front of the toilet bowl body 2. A rim waterway 24 is formed. Further, at the downstream end of the rim water passage 24, a rim water discharge port 26, which is a part of the rim water discharge portion, is formed.
Further, as shown in FIG. 2, the upstream side of the rim water passage 24 is connected to a water pipe 28 that supplies the washing water supplied from the water supply (not shown), which is the washing water source, to the rim water passage 24. .. The upstream side of the water pipe 28 is directly connected to a water supply (not shown) which is a washing water source, and the washing water supplied from the water pipe 28 into the rim water passage 24 by using the water supply pressure of this water pipe 28. Is guided forward in the rim water passage 24, then bends inward and rearward, and is guided to the rim spout 26 on the downstream side.
Then, the washing water guided to the rim spout 26 is discharged rearward (rim spout), and swirls in the bowl portion 20 through the headrace 30 near the downstream side of the rim spout 26 to form a bowl. A swirling flow is formed in the portion 20.

In the flush toilet bowl 1 of the present embodiment, the rim water passage 24 and the rim water discharge port 26, which are rim water discharge portions, are on the right side of the bowl portion 20 in the front side region when viewed from the front of the toilet bowl main body 2. The form arranged inside the bowl portion 18 will be described, but the present invention is not limited to such a form, and the rim spout is viewed from the front of the toilet bowl body 2 on the left side in the front side region of the bowl portion 20 or behind the bowl portion 20. It may be placed on the right side of the side region or on the left side of the rim 18 in the rear region of the bowl portion 20. For example, the rim spout may be arranged on the left rim portion 18 in the rear region of the bowl portion 20 and may be arranged so as to discharge water onto the headrace toward the front side. Further, the rim water discharge passage 24 and the rim water discharge port 26, which are the rim water discharge portions, are not limited to the one arranged in one place in the bowl portion 20 of the present embodiment, and may be arranged in two places. For example, the rim spout may be formed by a first rim spout on the left side in the rear region of the bowl portion 20 and a second rim spout on the right side in the rear region of the bowl portion 20.
Further, in the flush toilet 1 of the present embodiment, the rim water discharge portion 24 and the rim water discharge port 26 are integrally formed with the toilet body 2 by processing pottery. For example, resin. It may be formed as a separate body from the toilet bowl main body 2 and a water passage such as resin may be attached to the toilet bowl main body 2.

Further, as shown in FIG. 3, in the lower part of the bowl portion 20, a Zet water discharge portion 32 opened so as to be directed toward the inlet portion 22a of the drain trap pipeline 22 is formed. The Z water discharge unit 32 forms a water discharge port portion that discharges a jet jet. The Zet water discharge portion 32 is formed at the downstream end of the Zet headrace 31 that connects the water storage tank 34 (or water supply source) and the lower flow path of the bowl portion 20. The upstream side of the Zet headrace 31 is connected to the water storage tank 34 via the pressurizing pump 36. The Zet headrace 31 has such a flow path shape formed of pottery. Regarding the water discharge (jet water discharge) by the Z water discharge unit 32, the washing water stored in the water storage tank 34 provided in the water supply system function unit 12 is pressurized by the pressurizing pump 36 of the water supply system function unit 12. , It is designed to be discharged from the Zet water discharge unit 32.

Further, the wash water discharged from the Z-water discharge unit 32 flows into the ascending pipe 22b on the rear side of the inlet 22a from the inlet 22a of the drain trap pipeline 22, and then flows into the ascending pipe 22b. It flows out from the top 22c of the drain trap pipeline 22 to the descending pipeline 22d.
The water supply source for supplying wash water to the Zet headrace 31 may be a water supply or a water supply that utilizes the water supply pressure of the equipment, in addition to the water storage tank 34. The pressurizing pump 36 of the water supply system functional unit 12 may be omitted. For example, when a water supply direct pressure type water supply system is adopted, the pressure pump 36 may be omitted because the water pressurized by the water supply pressure of the tap water is supplied.

Here, since the specific structures of the sanitary cleaning system functional unit 10 and the water supply system functional unit 12 are the same as those of the conventional ones, detailed description thereof will be omitted, but the sanitary cleaning system functional unit 10 will be described. Is provided with a local cleaning device (not shown) including a nozzle device (not shown) that injects cleaning water toward the user above the bowl portion 20.
In addition, the sanitary cleaning system functional unit 10 has a water storage unit (not shown) for storing the cleaning water supplied to the local cleaning device (not shown), and the cleaning water in the water storage unit (not shown) at an appropriate temperature. A heater (not shown), a ventilation fan (not shown), a deodorizing fan (not shown), a hot air fan (not shown), and a controller that controls the operation of these devices. (Not shown) and the like are provided.
On the other hand, the water supply channel (not shown) of the water supply system functional unit 12 is connected to the water supply (not shown) whose upstream side is the water supply source, and is connected to the water supply channel on the upstream side of the water storage tank (not shown). Is provided with a constant flow valve (not shown), a solenoid valve (not shown), a switching valve (not shown) for switching between water supply to the water storage tank (not shown) and water discharge to the rim spout 26. Has been done. In addition to these, the water supply system function unit 12 also has an opening / closing operation of a solenoid valve (not shown), a switching operation of a switching valve (not shown), and a rotation speed of a pressurizing pump (not shown). A controller (not shown) that controls the operation time and the like is provided.

In the flush toilet 1 according to the present embodiment, the rim water discharge by the rim water discharge port 26 is performed by using the water supply pressure of the tap water, and the pressure pump (not shown) is controlled for the jet water discharge by the Z water discharge unit 32. The form of a so-called hybrid flush toilet that supplies wash water in a water storage tank (not shown) will be described, but the present invention is not limited to such a form, and other forms can also be applied. That is, as another form, even if the washing water directly supplied only from the tap water is switched between the rim water discharge by the rim water discharge port 26 and the jet water discharge by the Zet water discharge unit 32 by switching the valve. Alternatively, the washing water in the water storage tank may be in a form in which the rim water discharge by the rim water discharge port 26 and the jet water discharge by the Z water discharge unit 32 are switched by switching only the pump.

Next, with reference to FIGS. 2 to 7, the details of the headrace of the flush toilet 1 according to the embodiment of the present invention will be described.
4 is a cross-sectional view taken along line IV-IV of FIG. 2, FIG. 5 is a cross-sectional view taken along line V-V of FIG. 2, and FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG.

The bowl portion 20 is formed in a circumferential shape (for example, a strip shape over one circumference) between the filth receiving surface 14 and the rim portion 18, and the washing water discharged from the rim spout port 26 is easily guided in the circumferential direction. A headrace 30 for forming a swirling flow is formed in the portion 20.
The headrace 30 is connected to the upper end portion 14a of the filth receiving surface on the outer edge of the filth receiving surface 14 and is connected to the lower end portion 18a of the rim on the inner edge of the rim portion 18. The headrace 30 forms an egg-shaped circular flow path that matches the shape of the waste receiving surface 14 and the rim portion 18 when viewed from above. The headrace 30 constitutes an annular flow path. The headrace 30 is formed so that its height position is the same over most of the entire circumference, but in the front part of the bowl portion 20, it is higher than the height position of the headraces in other parts. Also forms a deep portion 30a that forms a deep position. The lower end portion 18a of the rim in the deep portion 30a of the headrace 30 is formed at a position lower than the lower end portion 18a of the rim in another region, and forms the lower end portion 18a of the rim at the lowest position. In this way, the deep portion 30a forms a valley-shaped bottom portion that is lowered by one step in the headrace 30.

As shown in FIGS. 4 to 6, the headrace 30 is slightly inside from the lower end portion 18a of the rim portion 18 to the upper end portion 14a of the filth receiving surface of the filth receiving surface 14 in most regions as described later. It forms a relatively flat plane that descends in the direction. Most of the headrace 30 is formed at the same height as the rim spout 26, except for the deep portion 30a described later and the inclined flow path to the deep portion 30a. The headrace 30 forms a relatively horizontal surface from the lower end portion 18a of the rim portion 18 to the upper end portion 14a of the filth receiving surface of the filth receiving surface 14. The headrace 30 forms a shelf-like (stepped) flat surface between the rim portion 18 and the waste receiving surface 14. Therefore, the washing water can flow so as to orbit on the headrace 30 having a continuous flat surface over the entire circumference. The wash water swirls in a spiral manner toward the center of the waste receiving surface 14 by gradually flowing down to the inner waste receiving surface 14 while trying to orbit on the headrace 30. A stream can be formed.
The rim spout 26 is connected to the rim spout 30b in a direction along the tangent line of the rim spout portion 30b of the headrace 30. Therefore, the washing water discharged from the rim spout 26 forms a circular flow (swirl flow) on the headrace 30 in a direction such that it orbits on the headrace 30.

In the front portion of the bowl portion 20, the headrace 30 forms a deep portion 30a at a position deeper than the height of the rim spout 26. The deep portion 30a of the headrace 30 is arranged at a height lower than the height position of the headrace 30 at another position of the headrace 30, for example, in the vicinity of the rim spout 30b, the rear portion 30f, the left front portion 30g, and the like. There is. Therefore, the deep portion 30a of the headrace 30 forms a deep part, for example, the deepest portion of the headrace 30.
By forming the height position of the deep portion 30a of the headrace 30 at a relatively low position in the front portion of the bowl portion 20, when the user urinates while sitting on the toilet seat 4, this urine is the headrace. It is possible to prevent the toilet bowl body 2 from flowing out or jumping out along the rim portion 18 that collides with 30 and rises straight upward from a relatively high position. Further, by forming the deep portion 30a of the headrace 30 at a relatively low height position, it is possible to prevent the urine from being flipped up by the headrace 30 and being applied to the user.
As described above, particularly when the rim portion 18 omits the shape of the overhang and forms a vertical wall surface that rises substantially upward, the guide portion near the front portion of the bowl portion 20, for example, the front end of the filth receiving surface 14. By forming the height position of the water channel 30 at a relatively low position, it is possible to suppress the outflow or outflow of urine.

Since the headrace 30 has a deep portion 30a, for example, a descending flow path portion in the circumferential direction D is partially formed from the left front portion 30g side toward the deep portion 30a along the circumference of the headrace 30a, and from the depth portion 30a. An ascending flow path 30c portion in the circumferential direction D is formed in a part thereof toward the portion near the rim spout 30b.

The headrace 30 is generally a bowl portion in the region from the rim spout 26 to the deep portion 30a of the headrace 30 in front of the bowl portion 20 along the water discharge direction (circumferential direction) of the rim spout 26. It forms a forward sloping surface or horizontal plane that descends from the outside to the inside of 20. The perpendicular line of such a forward-sloping surface of the headrace 30 extends toward the inside of the toilet bowl body 2. The forward sloping surface forms an inward facing surface. The portion of the headrace 30 other than the reversely inclined surface, which will be described later, basically forms a forwardly inclined surface. For example, in the portion near the rim spout 30b, the rear portion 30f, and the left front portion 30g, the headrace 30 forms a forward inclined surface. Since the headrace 30 forms a forward-sloping surface, a part of the washing water gradually flows down toward the filth receiving surface 14 on the lower side as it goes around the headrace 30.

Since the headrace 30 has a deep portion 30a, the rim discharge extends from the front end region to the right region in the front region of the bowl portion 20, for example, from the deep portion 30a to the rim spouting vicinity portion 30b, in whole or in part. An ascending flow path 30c is formed in which the height position of the flow path surface rises along the circumferential direction D of the washing water discharged from the water port 26. In the present embodiment, the ascending flow path 30c of the headrace 30 gradually ascends from the deep portion 30a to the portion near the rim spout 30b. The ascending flow path 30c of the headrace 30 extends from the front end portion 30d of the headrace 30 to the right side portion 30e, for example, the vicinity of the rim spout 26. The portion 30b near the rim spout of the headrace 30 is arranged at the height position of the rim spout 26, and is arranged at the same height position as the rear portion 30f, the left front portion 30g, and the like. The lower end of the ascending flow path 30c is connected to the deep portion 30a, and the upper end thereof is connected to the vicinity of the rim spout 30b.

The headrace 30 is an inclined surface descending from the inside to the outside of the bowl portion 20 or from the inside to the outside of the bowl portion 20 in at least a part of the ascending flow path 30c rising from the deep portion 30a, for example, the upper side portion. It is provided with a shelf portion 30h that forms a horizontal plane formed horizontally toward the surface.

The shelf portion 30h of the headrace 30 is formed from the central portion 30i of the ascending flow path 30c to the upper end portion near the rim spout 30b. The shelf portion 30h of the headrace 30 can be formed in all or part of the ascending flow path 30c, and may be formed only in the vicinity of the rim spout 26 at the upper end, for example. The shelf portion 30h of the headrace 30 is formed so as to include a region inside the rim spout 26 of the portion near the rim spout 30b where the headrace 30 merges with the rim spout 26. Since the shelf portion 30h is not formed from the deep portion 30a to the central portion 30i at the lower end of the ascending flow path 30c, the ascending flow path 30c is a forwardly inclined surface that descends from the outside to the inside of the bowl portion 20. Is forming.

As shown in FIG. 7, the shelf portion 30h of the headrace 30 forms a reversely inclined surface that descends from the inside to the outside of the bowl portion 20. That is, the reverse inclined surface of the shelf portion 30h is directed in the direction opposite to the forward inclined surface that descends from the outside to the inside of the bowl portion 20 on the left front portion 30 g side, for example. The reverse slope surface of the shelf 30h has a large outward slope as it rises from the start of the shelf 30h, and in the vicinity of the upper end thereof, it gradually decreases and returns to horizontal as the reverse slope rises. It is formed. The inverted inclined surface forms an outward surface of the toilet bowl body 2. The perpendicular to the inverted slope extends toward the outside of the toilet body. The shelf portion 30h is inclined toward the side opposite to the waste receiving surface 14 (outside of the toilet bowl main body 2). Therefore, the upper end portion 14a of the filth receiving surface is arranged at a position higher than the lower end portion 18a of the rim. The washing water flowing on the shelf portion 30h tends to approach (easily flow) toward the outside of the toilet bowl body 2, that is, toward the rim portion 18. Even when the force of the washing water weakens on the upper side of the flow path that rises in the circumferential direction D of the rising flow path 30c, it is possible to make it difficult for the washing water to flow down to the filth receiving surface 14 side, and the washing water can be made to flow. It can be guided to the downstream side while keeping it on the shelf portion 30h.

The shelf portion 30h of the headrace 30 may form a horizontal plane formed substantially horizontally from the inside to the outside of the bowl portion 20. In this case, the vertical line of the horizontal plane of the shelf portion 30h is inclined forward, for example. It is directed upward in the vertical direction, which is different from the surface. The shelf portion 30h does not form an inclination toward the filth receiving surface 14. Therefore, the upper end portion 14a of the filth receiving surface is arranged at the same height as the lower end portion 18a of the rim. When the shelf portion 30h of the headrace 30 forms a horizontal plane, the washing water flowing on the shelf portion 30h is unlikely to approach the inside or the outside of the toilet bowl body 2, and the direction and speed of its own flow, etc. To maintain. Therefore, even when the force of the washing water weakens on the upper side of the flow path that rises in the circumferential direction D of the rising flow path 30c, it is possible to make it difficult for the washing water to flow down to the filth receiving surface 14 side, and the washing can be performed. Water can be guided downstream while retaining on the shelf 30h.

The origin (center point) of the shelf portion 30h of the bowl portion 20 is the intersection of the front-rear direction axis A1 that bisects the bowl opening of the bowl portion 20 to the left and right and the left-right direction axis A2 that bisects the bowl opening to the front and back. It is defined as C, and is formed in the region E in the range of the central angle α1 degree or more and α2 degree or less from the front-back direction axis A1 on the downstream side with respect to the front-back direction axis A1 with the origin C as the center. For example, α1 degree is 20 degrees, and for example, α2 degree is 60 degrees.

Since the upper end of the ascending flow path 30c of the headrace 30 is formed in the vicinity of the rim spout 30b, the rim spout 26 and / or the rim water passage 24 after the water spouting from the rim spout 26 is completed. Even when a small amount of residual water leaks out from the above, the small amount of washed water that has flowed out flows down into the ascending flow path 30c of the headrace 30, and is deep along the shelf 30h in the ascending flow path 30c. Since the deep portion 30a forms an inwardly sloping surface, the washing water can flow down from the deep portion 30a to the filth receiving surface 14.
Further, when the force of the washing water weakens after the water is discharged from the rim water discharge port 26 and the washing water that cannot go up the ascending flow path 30c is generated, these washing waters are inclined in the reverse direction of the shelf portion 30h. It can be collected outward along the surface and flow down toward the deep portion 30a along the ascending flow path 30c of the headrace 30. In this way, even when the washing water that cannot go up the rising flow path 30c is generated, the washing water can flow down toward the deep portion 30a along the rising flow path 30c without being accumulated in the shelf portion 30h. Further, since the deep portion 30a forms an inwardly inclined forwardly inclined surface, the washing water can flow down from the deep portion 30a to the filth receiving surface 14.

Next, the operation (action) of the flush toilet according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5.
When the user presses, for example, an operation button (not shown) for general cleaning after using the toilet bowl, a signal from this operation button (not shown) is transmitted to the controller (not shown), and the flush toilet bowl is flushed. The cleaning operation for the large cleaning of 1 is started.
When the user operates an operation button (not shown), the controller causes the washing water to pass through the water pipe 28 and the rim water passage 24 from a water supply source such as a water supply, and is discharged from the rim spout 26.
The washing water discharged from the rim spout 26 flows downward while swirling in the bowl portion 20, and the inner wall surface of the bowl portion 20 is washed.

As shown by the arrow F1, the washing water discharged from the rim spout 26 is discharged from the rim spout 26 onto the rim spout portion 30b of the headrace 30. As shown by the arrow F2, the washing water discharged from the rim spout 26 forms a circular flow (swirl flow) on the headrace 30 in a direction (direction D in the circumferential direction) so as to orbit the headrace 30. To do. At this time, as shown by the arrow F3, the washing water gradually flows down to the inner filth receiving surface 14, thereby forming a swirling flow that spirally focuses toward the center of the filth receiving surface 14. it can.

As shown by the arrow F4, the washing water that has passed through the deep portion 30a of the headrace 30 rises in the circumferential direction D on the ascending flow path 30c of the headrace 30. At this time, since the washing water rises on the rising flow path 30c, the water force and the flow velocity of the washing water gradually weaken. Since a forward inclined surface is formed in the region from the deep portion 30a to the central portion 30i of the ascending flow path 30c, as shown by arrow F5, in such a region, the washing water swirling on the headrace 30 A part of it easily flows down onto the inner filth receiving surface 14.

As shown by the arrow F6, when the washing water reaches the shelf portion 30h of the ascending flow path 30c, the shelf portion 30h descends from the inside to the outside of the bowl portion 20 or from the inside to the outside of the bowl portion 20. Since a horizontal plane formed horizontally is formed, the washing water flows down from the shelf portion 30h of the ascending flow path 30c in the front portion of the bowl portion 20 to the sewage receiving surface 14 side inside the bowl portion 20. Can be suppressed.
Specifically, since the shelf portion 30h forms an inverted inclined surface, the washing water flowing on the shelf portion 30h receives a force P that causes the shelf portion 30h to approach the rim portion 18. Therefore, the washing water flowing on the shelf portion 30h is difficult to flow down from the upper end portion 14a side of the filth receiving surface even when the amount of washing water decreases, the water force weakens, or the flow velocity of the water flow decreases. It is suppressed from flowing down. In this way, the amount of washing water flowing down from the shelf 30h to the upper end 14a side of the filth receiving surface is suppressed, so that the amount of washing water flowing down from the shelf 30h to the upper end 14a side of the filth receiving surface can be reduced. It can be suppressed to a relatively small amount. Therefore, it is possible to prevent the cleaning water from flowing too much toward the filth receiving surface 14 side by the time it reaches the upper end of the ascending flow path 30c, and all the cleaning water is inside before reaching the upper end of the ascending flow path 30c. Suppresses the flow of the washing water to the filth receiving surface 14 and allows the washing water to reach the upper end of the ascending flow path 30c, and the flow flowing down from the ascending flow path 30c to the sewage receiving surface 14 side is almost the same as the ascending flow path 30c. It can be formed in a relatively wide area throughout. Therefore, the cleaning water does not reach the upper end of the ascending flow path 30c and the flow flowing down from the ascending flow path 30c to the filth receiving surface 14 side is not formed, so that an uncleaned region in the bowl portion 20 is generated. It can be suppressed more effectively.

In this way, a flow flowing down from the headrace to the filth receiving surface 14 side is formed over a relatively wide range from the upper headrace 30 that has passed through the ascending flow path 30c or from a portion in the middle of passing through the ascending flow path 30c. be able to. In addition, also at the upper end of the ascending flow path 30c (the headrace portion immediately before the rim spout 26 of the rim spout portion 30b) where the water force and the flow velocity of the washing water circulating on the headrace 30 tend to be weakest. Suppresses the washing water from flowing down to the upper end 14a side of the filth receiving surface, suppresses the amount of washing water flowing down from the upper end to the upper end 14a side of the filth receiving surface to a relatively small amount, and rims the washing water on the headrace 30. It can be circulated up to the portion 30b near the spout.

Therefore, it is possible to prevent all of the cleaning water guided in the circumferential direction from flowing down to the inner filth receiving surface 14 before reaching the upper end of the ascending flow path 30c. .. Therefore, the washing water flowing in the circumferential direction D on the headrace 30 cannot reach the upper end of the ascending flow path 30c and flows down, so that an unwashed region of the headrace 30 is generated and / or The washing water cannot reach the upper end of the ascending flow path 30c, and the flow of the swirling flow formed on the filth receiving surface 14 is biased, so that an unwashed region is generated on the filth receiving surface 14. From the state where the washing water reaches the upper end of the ascending flow path 30c, it flows down onto the filth receiving surface 14 and is not formed on the filth receiving surface 14 because the swirling flow formed on the filth receiving surface 14 is not formed. It is possible to more effectively suppress the generation of a non-cleaning region in the bowl portion 20, such as the generation of a cleaning region.

When the wash water reaches the front side of the rim spout 26 in the vicinity of the rim spout 30b, in combination with the flow of the wash water spouted from the rim spout 26 (see arrow F1), it is further on the headrace 30. A flow is formed that tries to go around.

The wash water gradually flows down to the inner filth receiving surface 14 while trying to orbit on the headrace 30, and forms a swirling flow that focuses toward the center of the filth receiving surface 14. It is possible to make it difficult for the washing water to flow down in the region of the shelf portion 30h of the ascending flow path 30c where the force of the washing water is weakened and the washing water easily flows down to the filth receiving surface 14 side. Therefore, it is possible to prevent the washing water from flowing too much toward the filth receiving surface 14 side by the time it reaches the upper end of the ascending flow path 30c, so that the washing water flows down relatively evenly from the entire circumference of the headrace 30. The entire filth receiving surface 14 can be evenly washed with the washing water so as not to generate a non-cleaning area.

The wash water that has flowed down the filth receiving surface 14 is flowed down to the water reservoir 17 and flows into the drain trap pipeline 22. Around the same time, the washing water discharged from the Z-water discharge unit 32 by the pressurizing pump 36 operated by the controller flows into the drain trap pipe 22 and fills the drain trap pipe 22 to cause a siphon phenomenon. Due to this siphon phenomenon, the accumulated water and filth in the bowl portion 20 are sucked into the drain trap pipeline 22 and discharged from the drain pipe (not shown) on the downstream side.
After a predetermined time has elapsed since the washing water was supplied to the toilet bowl body 2, the controller (not shown) ends the water discharge from the rim water discharge port 26, stops the operation of the pressurizing pump 36, and causes the Z water discharge unit 32 to stop the operation. The water discharge is also stopped, and a series of cleaning operations is completed.

Next, the operation of the flush toilet 1 according to the above-described embodiment of the present invention will be described.
First, according to the flush toilet bowl 1 according to the present embodiment, the wash water conducted in the circumferential direction on the headrace 30 rises in the ascending flow path 30c rising from the deep portion 30a of the headrace 30, and the water force of the wash water. Is weakened, in at least a part of the ascending flow path 30c of the headrace 30, the shelf portion 30h is an inclined surface that descends from the inside to the outside of the bowl portion 20 or is horizontal from the inside to the outside of the bowl portion 20. Since the horizontal surface formed in the above is formed, it is possible to prevent the washing water from flowing too much toward the sewage receiving surface 14 inside the bowl portion 20 by the time it reaches the upper end portion of the ascending flow path 30c. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface 14 before reaching the upper end of the ascending flow path 30c, and the washing water does not reach the upper end of the ascending flow path 30c and rises. It is possible to more effectively suppress the generation of an uncleaned region in the bowl portion 20 by preventing the formation of a flow flowing down from the flow path 30c to the waste receiving surface 14 side.

Next, according to the flush toilet bowl 1 according to the present embodiment, the wash water conducted in the circumferential direction on the headrace 30 rises in the ascending flow path 30c rising from the deep portion 30a of the headrace 30, and the wash water When the water force is weakened, the washing water rises because the shelf portion 30h forms an inclined surface that descends from the inside to the outside of the bowl portion 20 in at least a part of the ascending flow path 30c of the headrace 30. By the time it reaches the upper end of the flow path 30c, it is possible to prevent it from flowing too much toward the filth receiving surface 14 inside the bowl portion 20. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface 14 before reaching the upper end of the ascending flow path 30c, and the washing water does not reach the upper end of the ascending flow path 30c and rises. It is possible to more effectively suppress the generation of an uncleaned region in the bowl portion 20 by preventing the formation of a flow flowing down from the flow path 30c to the waste receiving surface 14 side.

Further, according to the flush toilet bowl 1 according to the present embodiment, the ascending flow path 30c in which the flush water conducted in the circumferential direction on the headrace 30 rises from the deep portion 30a at the front portion of the bowl portion 20 to the rim spout 26. In at least a part of the ascending flow path 30c of the headrace 30, the shelf portion 30h descends from the inside to the outside of the bowl portion 20 when the washing water is weakened. Since a horizontal plane formed horizontally from the inside to the outside of the bowl portion 20, the washing water flows too much toward the filth receiving surface 14 side inside the bowl portion 20 by the time it reaches the upper end portion of the ascending flow path 30c. It is possible to prevent it from being washed away. Therefore, it is possible to prevent the washing water from flowing down to the inner filth receiving surface 14 before reaching the upper end of the ascending flow path 30c, and the washing water does not reach the upper end of the ascending flow path 30c and rises. It is possible to more effectively suppress the generation of an uncleaned region in the bowl portion 20 by preventing the formation of a flow flowing down from the flow path 30c to the waste receiving surface 14 side.
Further, since the rim spout 26 is arranged so as to discharge water toward the rear in the front region of the bowl portion 20, the rim spout 26 can be seen from the user standing on the front side of the bowl portion 20. It is difficult and inconspicuous. Therefore, by making the rim spout 26 inconspicuous, it is possible to prevent the user from worrying about dirt and the like on the rim spout 26, and it is possible to easily give the user an aesthetic appearance as the bowl portion 20 as a whole.

Further, according to the water-washing stool 1 according to the present embodiment, the ascending flow path 30c in which the washing water conducted in the circumferential direction on the headrace 30 rises from the deep portion 30a at the front portion of the bowl portion 20 to the rim spout 26. The shelf portion 30h is directed from the inside to the outside of the bowl portion 20 from the central portion to the upper end portion of the ascending flow path 30c of the headrace 30 in which the water force of the washing water is particularly weakened when the water force of the washing water is weakened. Since the inclined surface that descends from the inside or the horizontal surface formed horizontally from the inside to the outside of the bowl portion 20 is formed, the inside of the bowl portion 20 is reached before the washing water reaches the upper end portion of the ascending flow path 30c. It is possible to prevent the filth receiving surface 14 from flowing down too much.

Further, according to the water-washing stool 1 according to the present embodiment, the ascending flow path 30c in which the washing water conducted in the circumferential direction on the headrace 30 rises from the deep portion 30a at the front portion of the bowl portion 20 to the rim spout 26. In the region of the central angle of 20 degrees or more and 60 degrees or less from the anteroposterior axis A1 where the water force of the washing water is particularly weakened when the water force of the washing water is weakened, the shelf portion 30h is the bowl portion 20. Since an inclined surface descending from the inside to the outside or a horizontal plane formed horizontally from the inside to the outside of the bowl portion 20 is formed, the bowl is formed by the time the washing water reaches the upper end portion of the ascending flow path 30c. It is possible to prevent the portion 20 from flowing down too much toward the filth receiving surface 14 inside.

1 Flush toilet 2 Toilet bowl body 4 Toilet seat 6 Toilet lid 8 Functional part 10 Sanitary cleaning system functional part 12 Water supply system functional part 14 Sewage receiving surface 14a Sewage receiving surface upper end 17 Water collecting part 18 Rim part 18a Rim lower end 20 Bowl part 22 Drain trap pipeline 22a Inlet 22b Ascending pipeline 22c Top 22d Down pipeline 24 Rim water passage 26 Rim water spout 28 Water conduit 30 Headrace 30a Deep 30b Rim spout 30c Rising channel 30d Front end 30e Right side 30f Rear part 30g Left front part 30h Shelf part 30i Central part 31 Zet headrace 32 Zet water discharge part 34 Water storage tank 36 Pressurized pump A1 Front-back direction axis A2 Left-right direction axis C Origin D Circumferential direction E Area F1 Arrow F2 Arrow F3 Arrow F4 Arrow F5 arrow F6 arrow F7 arrow P force

Claims (4)

A flush toilet that is washed with wash water supplied from a wash water source and discharges filth.
A bowl portion having a bowl-shaped waste receiving surface and a rim portion forming a vertical wall surface that rises almost upward.
A drain trap pipe that is connected to the bottom of this bowl and discharges filth,
It has a rim spouting portion provided on the rim portion and spouting washing water into the bowl portion.
The bowl portion is formed in a circumferential shape between the filth receiving surface and the rim portion, and the washing water discharged from the rim water discharge portion is easily guided in the circumferential direction, thereby causing a swirling flow in the bowl portion. Form a headrace to form,
The headrace may be an inclined surface that descends from the inside to the outside of the bowl portion or horizontally from the inside to the outside of the bowl portion in at least a part of the ascending flow path that rises from the deep part of the headrace. A shelf portion forming a formed horizontal plane is provided, the rim water discharge portion is arranged at one place of the rim portion, and the ascending flow path rises from the deep part of the headrace toward the rim water discharge portion on the downstream side. Then, the washing water that rises from the deep part of the headrace can easily flow toward the rim water discharge portion along the shelf portion, so that the wash water discharged from the rim water discharge portion at one place can be easily flowed. However, a flush stool is characterized in that even if the ascending flow path that rises from the deep part of the headrace is provided, a circular flow that goes around the headrace is formed. A flush toilet that is washed with wash water supplied from a wash water source and discharges filth.
A bowl portion having a bowl-shaped waste receiving surface and a rim portion forming a vertical wall surface that rises almost upward.
A drain trap pipe that is connected to the bottom of this bowl and discharges filth,
It has a rim spouting portion provided on the rim portion and spouting washing water into the bowl portion.
The bowl portion is formed in a circumferential shape between the filth receiving surface and the rim portion, and the washing water discharged from the rim water discharge portion is easily guided in the circumferential direction, thereby causing a swirling flow in the bowl portion. Form a headrace to form,
The headrace is an inclined surface that descends from the inside to the outside of the bowl portion or horizontally from the inside to the outside of the bowl portion in at least a part of the ascending flow path that rises from the deep part of the headrace. With shelves forming the formed horizontal plane,
The rim water discharge portion is arranged so as to discharge water toward the rear in the front side region of the bowl portion, and the ascending flow path of the headrace is from the deep portion of the front portion of the bowl portion to the rim. A flush toilet that forms an ascending flow path to the water discharge part. The flush toilet according to claim 1 or 2, wherein the shelf portion of the headrace is formed from the central portion to the upper end portion of the ascending flow path. The origin of the shelf of the headrace is the intersection of the anteroposterior axis that bisects the bowl opening of the bowl in the left-right direction and the left-right axis that bisects the bowl opening in the anteroposterior direction. As the center, of the left and right regions of the anteroposterior axis, the region on the downstream side of the swirling flow formed in the bowl with respect to the anteroposterior axis and the central angle from the anteroposterior axis in the range of 20 degrees or more and 60 degrees or less. The water-washing stool according to claim 1 or 2, which is formed in the area.

Images